These were very fragile and many broke. Wondering what I did wrong?

I found out that the type of blue cheese that you use can affect the texture also. I had a batch that was super crumbly when I used a softer creamier blue cheese.

Thanks. I did refrigerate in a log overnight. They tasted great but didn't look great. THey spread quite a bit and were really thin.

They are crumbly, but I wonder if maybe your butter got too warm, or if your flour measurements were off a bit on the low side? I know she said for the butter to be room temperature, but I would try chilling it and possibly add a bit more flour. You could also try refrigerating them before baking them--that should help them hold together better. It's sad because they're really wonderful--I hope this helps. (And maybe TheRunawaySpoon will see this and weigh in).